Some SendPorts do not send files

I have a SendPortGroup with 3 SendPorts. I use filter in SendPortGroup such that if there is a message fulfill the filtering criteria, 3 SendPorts should send this message to the corresponding outbound folders.

Today I found that only 1 SendPort send the messages, the other 2 do not.

After restarting the Send and Receive host instance, it resumes normal, 3 SendPorts can send message.

During the abnormal stage, there is no error event captured in event log.

I hope you have installed all the latest Service packs for BizTalk 2006 R2. The support from Microsoft on BizTalk 2006 R2 has expired on 7/12/2011. I would recommend you to plan moving to the latest version 2013R2 which will be released soon asap.

In Biztalk running service instance, I found the 2 sendport service instance and those not-sent messages can be found the message tab and the message status is “In process”, but in fact the process should be completed a few hours ago.